Automatic drilling machine and machine for other purposes



AUTOMATIC DRILLING MACHINE AND MACHINE FOR OTHER PURPOSES Filed June 25, 1930 3 Sheets-Sheet l 32 I I4 i" 4-. "a 5 1% r 24 .0

I 6 I g Q 7.0 l \Q /\I\% IS 9 2 g 2| I9 4 46-2 Inventor. Ralph M. Love oy byfmdMkW ATTyS.

June 12, 1934. R. M, LQVEJOY 7 1,962,566

AUTOMATIC DRILLING MACHINE AND MACHINE FOR-OTHER PURPOSES Filed June 25, 1930 3 Sheets-Sheet 2 lnvenTor. Ralph M. Lovej 0y bymwdm ATTys.

June 12, 1934. L V Y 1,962,566

AUTOMATIC DRILLING MACHINE AND MACHINE FOR OTHER PURPOSES Filed June25, 1930 s Sheets-Sheet 5 I39 I37 MO 3 I38 I I3 Fig.8.

H76; 15 '5 If SI 95 80 Z r s4 InvenTor. I33 Ralph MLove joy byMMkW Anya.

Patented June 12, 1934 UNITED STATES PATENT OFFICE AUTOMATIC DRILLING MACHINE AND MACHINE FOR OTHER PURPOSES 16 Claims.

This invention relates to improvements in au tomatic drilling machines and machines for other purposes in which the work is carried by a travelling carrier successively to a plurality of tool stations at which it is operated upon by a tool, such as a drill, countersink, reamer, or other suitable tool which is reciprocated relatively to the work supported upon the carrier.

The present application is a continuation in part of my prior application Serial Number 441,387, filed April 3, 1930, and relates particularly to the mechanism for supporting and reciprocating the tools which is disclosed generally in my prior application and more particularly in detail herein.

My prior application aforesaid, and also an earlier application Serial Number 171,316, filed February 26, 1927 now Patent No. 1,799,594, granted April 7, 1931, referred to therein, more particularly relate to hydraulically controlled mechanisms for insuring accuracy in indexing the travelling carrier for the work and for controlling the operations of the tools in timed relation to the indexing of the carrier.

The present invention relates more particularly to the mechanism for supporting and actuating the tools and means for adjusting the position of the respective tools accurately with relation to the work which is secured upon the carrier.

The tool-supporting mechanism is mounted upon a central column rising from the base of the machine, and one of the objects of the invention is to provide simple and accurate means for adjusting the position of the tool substantially radially with respect to the axis of the column.

Another object of the invention is to provide means for adjusting the tool accurately circumferentially relatively to the axis of the column, means desirably being provided for conjointly locking the tool-supporting means in its radially and circumferentially adjusted position.

A further object of the invention is to provide means connecting adjacent tool-supporting frames operable when one frame is clamped in adjusted position to adjust the next adjacent frame circumferentially relatively thereto.

Another object of the invention is to provide novel mechanism for effectively moving the tool slide toward and from the work, preferably provided with anti-friction means to secure smooth and efiicient reciprocation of the tool slide. This is accomplished by providing a cam follower mounted upon anti-friction bearings actuated by a cam shaft also mounted in anti-friction bearmgs.

A further object of the invention is to provide novel means for maintaining the cam follower in engagement with the cam and which will also permit the radial circumferential adjustnient of the tool relatively to the axis of the central column.

Another object of the invention is to provide an improved tool slide, preferably of tubular cylindrical form, having both external and internal bearings.

A further object of the invention is to provide a tool slide of this character carrying a tool spindle reciprocably movable within the internal bearing of the tool slide.

Another object of the invention is to provide a tool-actuating construction in which the tool spindle is mounted upon the frame which supports the tool slide and which is movable with the tool slide to adjusted positions, an independent motor being employed for actuating each of the tool spindles of the machine.

Machines of the character described in this application and in my prior applications are of large size and consequently the central column, which carries the tool supports, the tools, and the mechanism for actuating the same, is of considerable length and desirably is not made integral with the base.

Another object of the invention is to provide a machine of the character described having a central column which is detachably secured to the base, with a central driving shaft for the travelling carrier mounted in and extending axially through the column and formed in alined sections separable in proximity to the junction and the bottom of the column, with means for automatically locking the shaft sections against relative movement when the column is assembled upon the base.

These and other objects and features of the invention will more fully appear from the following description and the accompanying drawings and will be particularly pointed out in the claims. 100

The base of the machine disclosed in the present application may be and desirably is the same as that disclosed in my prior application Serial Number 441,387, and illustration of the general mechanism disclosed therein is, therefore, un- 105 necessary.

In the drawings:

Fig. 1 is a view, partly in section and partly in elevation, of the present invention, the tool-supporting and actuating mechanism being shown H0 in elevation, and a portion of the base of the machine, the rotatable Work carrier and the central column illustrated in vertical section;

Fig. 2 is a detail view, mainly in plan, illustrating the position and construction of three of the tool-supporting units and the means for adjusting the same circumferentially with respect to the column which is shown in transverse section, and also illustrating in transverse section the preferred mechanism for adjusting the tool-supporting frames substantially radially with respect to the axis of the column;

Fig. 3 is a detail vertical sectional view centrally of the work supporting frame, tool slide, and mechanism for actuating the same, showing the tool spindle mainly in elevation, and also i1- lustrating in vertical section the manner in which the tool spindle is rotatably mounted within the tool slide and secured against relative longitudinal movement in respect thereto; and,

Fig. 4 is a detail view of the cam follower and the means by which it is secured to the tool slide, the tool slide, the spindle and the bearing for the spindle being illustrated in section.

The base, the rotatable carrier mounted thereupon, the mechanism for indexing the base and locking the carrier with the work presented at successive tool stations, and the vertical central column rising from the base, may be and desirably are the same as illustrated in my prior application Serial Number 441,387.

As illustrated herein the machine comprises a hollow base having a peripheral side wall 1, and a preferably integral top 2 having an upwardly extending cylindrical boss 3, and an integral upwardly extending ring 4: in proximity to the periphery thereof, with an outer flange 5 extending upwardly and providing a channel surrounding a downwardly extending flange upon the rotating table or work carrier. The work carrying table 5 is supported near its outer periphery upon the upwardly extending ring 4 of the boss and is provided with a central hub '7 which is journalled upon the outer cylindrical wall of the upwardly extending boss 3, the lower end of the hub 7 resting. upon a shoulder 8 at the lower portion of the boss 3. The carrier 6 is provided at its periphery with a downwardly extending flange 9 which projects into an annular space between the ring 1 and the outer flange 5 of the base.

in this construction, as in that disclosed in my prior applications, a plurality of work supporting members 10, preferably in the form of flat sectors, are slidably supported upon the carrier or table 6, and are movable relatively thereto both radially and circumferentially. The inner ends of the work supporting sectors 10 are provided with ac-- curately finished cylindrical peripheries ll adapted to engage a complementary accurately finished cylindrical surface upon a plate 12 having a central bore which engages a cylindrical housing 13 which extends through and fits a central cylindrical aperture in the upper end of the boss 3 of the base.

A circular plate 14, of larger diameter than that of the plate 12, rests upon, the plate 12 and overlies the end of the work supporting sectors 10. The central housing 13 is provided with a laterally extending flange 15 which rests upon and engages the plate 14. The central column 15 is provided at its lower end with an outwardly extending flange 17 which rests upon the flange 15 of the housing 13, and suitable bolts 18, extending through the flange 17 of the column, the flange 15 of the housing 13, the plates 12 and 11,

and into the cylindrical wall of the boss 3, serve to clamp these parts together and rigidly secure the same to the base of the machine.

The downwardly extending boss is provided with a ring gear 19 which is engaged by a pinion 20 mounted upon a shaft 21 journalled in suitable bearings carried by the base of the frame and actuated through a train of mechanism (not shown) from a central driving shaft 22. The mechanism for actuating the central driving shaft 22 for the work supporting table is fully illustrated in my prior application. The work pieces 23 desirably are secured respectively to jigs 2- which are in turn rigidly secured to the work supporting sectors 10.

In View of the fact that the central column, which supports the superstructure of the machine, is necessarily of considerable weight and desirably is constructed in such a manner as to be detachable from the base, the driving shaft 22 is formed in alined separable sections abutting at their ends in proximity to the bottom of the base of the column, with means for automatically connecting the sections of the shaft against relative rotation when the column is superimposed upon and connected to the base.

In the preferred construction illustrated herein the upper end of the lower section of the shaft 22 is journalled in a bushing 25 in a spider 26 which is countersunk into the upper portion of the housing 13. A block 27 is secured to the upper end of the lower shaft section by a feather 28 and rests upon the bushing 25 of the spider 26. The lower end of the upper shaft section 29 has a fitting secured to it comprising a hub 39 from which ribs 31 extend downwardly and outwardly and merge into a horizontal flange 32 which is rotatably mounted in a countersink in the lower end of the column 16. The hub 30 of the fitting is secured to the lower end portion of the upper shaft section 29 by one or more set screws 33, or in any other suitable manner.

The hub 30 of the fitting is provided with a vertical bore in which a large pin 34 is slidably mounted and which is adapted to engage a complementary socket in the block 2'7. A spring 35, interposed between the upper end of the pin 34 and a bracket 36 fixedly secured to the upper shaft section 29, serves to force the pin normally into engagement with the socket in the block 2'7, as illustrated in Fig. 1.

In assembling the machine the spider 26 is slipped over the upper end of the lower section of the shaft 22 and is seated in its countersink in the housing 13. The bracket 36, with the springpressed pin and fitting 30 are secured to the lower end portion of the upper section 29 of the shaft. When the column is erected and its flange 17 superimposed upon the flange 15 of the housing 13, the pin 34 may engage the socket in the block 27, or may rest upon the top of the block. In the latter case a partial revolution of the upper shaft section 29 will bring the pin 34 into registry with its socket and the spring 35 will force it into the socket, thereby automatically locking the sections of the shaft together in operative position. The column may then be secured firmly to the bed of the machine by the bolts 18.

When it is desired to dismantle the machine, withdrawal of the bolts 18 will permit the column to be raised out of engagement with the base and the coupling between adjacent ends of the shaft sections will be readily disengaged. By reason of this construction, therefore, the superstructure, which carries the tools and their actuating mechanisms, can readily be assembled upon or removed from the base, thus greatly facilitating the transportation, erection and dismantling of the machine.

The column 16 is provided with widely separated enlarged portions 37 and 38 upon which the lower and upper heads of a bracket for supporting the tool-carrying frames and the mechanisms for actuating the tools are mounted. The upper and lower heads may be of identical, but reversely arranged construction and a description of one is sufiicient.

The upper head 39 is illustrated in plan view in Fig. 2 and comprises a ring 40 which fits upon the enlarged portion 38 of the column, and an up wardly extending fiange4l which also fits the enlarged portion of the column. The ring, and also the flange 41, is provided with a slot 42 which desirably is oblique to the radius of the ring and clamping screws 43 and 44 serve to clamp the ring and its flange firmly upon the enlarged portion 38 of the column. The lower head 45 of the bracket is of identical construction except i that the flange 46 thereof extends downwardly instead of upwardly. It is clamped upon the enlarged portion 37 of the column in a similar manner. The heads of the column are connected together and spaced apart by a series of vertical hollow cylindrical posts 47 which are seated in semi-cylindrical sockets in the periphery of the ring 40 and are secured rigidly thereto} by U- shaped clamping members 48 which are bolted to the ring 40 as illustrated in Fig. 2. The posts 47 are located at the respective tool stations and the tool-supporting frames are mounted upon these posts.

Desirably means are provided for adjusting the tool-supporting frame substantially radially with respect to the axis of the central column.

To accomplish this purpose an eccentric sleeve 49 is mounted upon each of the posts 47 and each of the tool-supporting frames is provided with upper and lower extensions adapted to embrace and to be clamped upon, the eccentric sleeves. The upper and lower ends of the eccentric sleeves 49 are provided with slots 50 which extend inwardly from the respective ends of the eccentric sleeves, preferably to a distance beyond the extensions of the tool-supporting frames, so that when the frame extensions are clamped upon the sleeves the ends of the sleeves will yield sufficiently to enable them to be clamped firmly upon the posts 47.

The tool-supporting frames desirably are of identical construction and each comprises a lower head 51 and an upper head 52 having respectively lateral extensions 53 and 54 which are provided with cylindrical apertures closely fitting upon the eccentric 49 and split at their inner ends to enable them to be assembled upon the eccentric 49. The inner ends of the extensions are provided with bosses adapted to be drawn toward each other by clamping bolts 55 which when set up will clamp the extensions of the heads upon the eccentric and will also clamp the split ends of the eccentric upon the posts. By this means the frame may be locked in any adjusted position.

. The heads 51 and 52 of the frame are connected by a preferably integral hollow web 56, the chamber of which extends through the upper and lower heads for purposes which will hereinafter be described. Other connecting members such as posts 56a may also be employed to insure rigidity of the frame.

A substantially radial adjustment of the toolsupporting frames may be accomplished by rotatably adjusting the eccentric 49 upon its post 47. Any suitable means may be provided for accomplishing this purpose. In the preferred construction which is illustrated herein the eccentric has secured to it, preferably centrally of its length, a circular plate 57 provided with a flange 58, (see Fig. 2), having a plurality of vertical holes any one of which is adapted to receive a pin extending through the bifurcated end of an L-shaped link 59 which forms one of the female members of a turnbuckle 60. The other female member 61 is pivotal'y connected to a plate 62 secured to the frame. Radial adjustment of the frame with respect to the axis of the column may be effected by releasing the clamping bolts 55 and actuating the male member of the turnbuckle to rotate the eccentric 49 upon the post 47 such distance as may be required to provide the correct adjustment.

In order to effect the circumferential adjustment, preferably the upper heads of adjacent tool-supporting frames are connected together by suitable mechanism for moving said adjacent frames relatively to each other.

In the preferred construction illustrated each of the upper heads 52 of the bracket has superimposed upon it a casing 63 which comprises a portion of a housing for the gear spindle, a support for an electric motor 64, and a downwardly extending casing 65 forming a housing for the train of gears through which the tool spindle is driven from the motor. Each of the housings 63 is provided with an car 66 to which a link 67 is pivotally connected, the opposite end of the link being pivotally connected to one of the female members 68 of a turnbuckle having a male member 69 entering the member 68, the opposite female member '70 of the turnbuckle being pivotally connected to an ear '71 upon the housing 63 of the next adjacent tool-supporting mechanism.

In positioning the tools of the respective toolsupporting frames circumferentially with respect to the axis of the column, the bolts 55 of the extensions of one of the frames are loosened, and

the frame swung about the eccentric until the tool is properly located in respect to the work. The bolts-55 are then set up, thereby locking this tool frame against movement. The bolts 55 of the next adjacent frame are then loosened and the male member 69 of the turnbuckle rotated in the proper direction to move said next adjacent frame circumferentially about the eccentric upon which it is mounted, until the tool is properly positioned with respect to the work at each station, proper adjustment of the eccentric being made before or during such circumferential adjustment as will position the tool radially with respect to the axis of the column.

Adjustments of the other tool-supporting frames are made in a similar manner and corrective adjustment of any improperly adjusted frame may be made at any time to center the tool properly with respect to the work at its tool station.

An important object of the invention is to provide a novel tool slide and means for actuating the same. In the preferred construction illustrated the tool slide '72 is of tubular cylindrical form, (see Fig. 3) and is reciprocably mounted in a bearing block '73 extending through a suitable aperture in the lower head 51 of the toolsupporting frame and provided with an annular flange which is secured thereto by bolts '74. The upper head 52 of the tool-supporting bracket has with a cam follower having anti-friction means mounted upon it a bearing block '75 having a central hub '76 which extends downwardly into an aperture in the head 52 and supports a bearing sleeve '77 which extends downwardly through the chamber of the tool slide '72 and preferably to a point below the lower bearing '73 of the slide.

The upper end of the sleeve '77 is rigidly secured to the bearing block '75 by suitable screws '78. The upper end portion '79 of the tool slide '72 desirably is of reduced diameter and is enclosed in a cylindrical dust guard which is secured at its upper end to the hub '76 by certain of the screws '78. The upper end of the reduced portion of the tool slide is provided with a bushing 81 which slidably fits upon the outer wall of the sleeve 7'7. The sleeve '77 has secured to it at its lower end portion a bushing 82 which slidably engages the inner wall of the cylindrical tool slide 72.

It will, therefore, be obvious that upon reciprocation of the tool slide, the upper bushing 81, which is secured to the tool slide, will move with the slide up and down relatively to the sleeve '77, while the lower bushing '78 will remain stationary and the tool slide will be reciprocated relatively thereto. By virtue of this construction the tool slide is always provided with bearings which are spaced apart a sufficient distance to insure proper guidance of the tool slide and to prevent lateral vibration thereof.

Any suitable means may be provided for reciprocating the tool slide. The present invention, however, contemplates the employment of novel means for actuating the tool slide with a minimum amount of resistance or friction and which is also capable of such adjustment as may be desirable to enable the tool to enter the work a predetermined proper distance. In the preferred construction illustrated the toolslide is provided which are engaged by a cam which is replaceable and the shaft of which is also mounted in antifriction bearings.

In the construction illustrated the tool slide '72 is provided approximately centrally of its length with a recess presenting a flat face 83 upon which the base 84 of the cam follower is clamped. The sides of the base 84 are curved to fit the cylindrical wall of the tool slide and a complementary semi-circular clamping member 85, fitting the tool slide, is secured to the base 84 by bolts 86 which clamp the base firmly upon the tool slide.

The base is provided with a radially extending stud 87 upon which anti-friction bearings, preferably ball bearings 88, are mounted, and a cam follower 89 is mounted upon the ball bearings. A suitable cover plate 90, which is screw threaded into a countersink in the end of the cam follower, prevents the entrance of dust into the ball bearing. The cam follower is engaged and actuated by a cam 91 which is detachably secured by screws 92 to a flange upon a cam shaft 93 which is mounted in ball bearings 9c in the hub of a casing 95 which in turn is mounted in a boss 96 in a plate 97 which is detachably secured to the heads 51 and 52 of the tool-supporting frame by machine bolts 98 which pass through slots in said plate. Upper and lower adjusting screws 99, seated in the ends of the plate 9'7, abut against the machine bolts 98 and provide means by which the plate may be adjusted vertically relatively to the heads 51 and 52 of the tool-supporting frame.

The outer end of the cam shaft 93 is also supported in ball bearings 100 mounted in a boss of a cover plate 101. A worm gear 102, which is secured to the cam shaft 93, is actuated by a worm 103 which is enclosed in cylindrical extensions 104 and 105 of the plate 97 and the cover plate 80 101. The worm 103 desirably is slidably feathered upon its shaft 106 to permit vertical adjustment of the cam-supporting plate 97. The lower end of the worm shaft 106 is stepped in a suitable bearing 107 which is secured to the lower end of the cylindrical extensions of the plate 9'7 and cover plate 101.

The worm shaft 106 may be driven in any suitable manner, but preferably is actuated by a countershaft which is driven from a central ring gear mounted upon the upper end of the column as in the manner disclosed in my prior applications aforesaid.

By thus providing means for detachably and adjustably securing the plate 9'7 to the head of the tool-supporting frame, the plate 97, with the cam and worm wheel mounted thereon, can be removed or swung aside about the axis of the shaft 106 to permit detachment of the cam 91 and the substitution of cams having such greater or less throw as may be required to feed the tool a desired distance into the work. Further vertical adjustment may be made by manipulation of the screws 99 so that the depth of penetration of the tool into the work may be accurately determined, and also suitable adjustment made to compensate for the wear-of the tool.

Yieldable means are provided for maintaining the cam follower 89 in constant engagement with the cam 91. In the preferred construction illus- 110 trated herein the lower end of the cylindrical tool slid-e '72 has a ring 108 secured to it preferably by spot welds 109. A plate 110, having an annular boss seated in a countersink in the lower end of the cylindrical tool slide, is secured to the ring 108 by a clamping plate 111 and bolts 112 extending through the ring 108, the plate 110, and screw threaded into the clamping plate 111.

The plate 110 is provided with a lateral extension 113 to which is secured a vertical rod 114 which extends upwardly through the chamber of the hollow post 56 which, as above described, is preferably integral with the heads 52 and 53. The upper end of the rod 114 is secured to a cable, chain, or other flexible member 115 which passes over a sheave 116 and is connected at its opposite end to a counterweight 11'7 reciprocable in the chamber of the hollow post 4'7. The sheave 116 is mounted upon upwardly extending arms 118 of a bracket having a cylindrical split base 119, (see Figs. 1 and 2), which surroimds the upper end of the post 42 and is clamped thereupon by a suitable bolt 120. The bracket 119 is, therefore, rotarily adjustable about the axis of the post to permit such adjustment as may be necessary properly to position the pulley when the toolsupporting frames are rotarily adjusted about the axis of the post e7.

The tool spindle 121 is of a diameter to fit closely but rotatably within the long bearing sleeve '77 and is provided at its lower end with a slightly enlarged portion 122 above which is a screw threaded portion having thereupon a nut 123 and above the nut a washer and a lock nut. The lower edge of the nut 123 engages the inner race of a ball bearing, the outer race of which is seated in a countersink in the clamping plate 111 which secures the plate 110 to the ring 108 upon the lower end of the tool slide 72.

A dust guard 124 is held against the lower end of the inner race of the ball bearing by an externally screw threaded collar 125 which desirably is mounted upon and spot Welded to the enlarged portion 122 of the tool spindle. The enlarged lower end of the tool spindle is counterbored to receive a bushing 126 for the reduced upper end of a tool holder 127 which is provided with a lateral flange 128 which is engaged by an annular nut 129 screwed upon the collar 125 with a suit able bushing 130 therebetween. Relative rotation between the tool spindle and tool holder 127 is prevented by a key 131, the upper end of which is seated in alined recesses in the collar 125, and the lower end 122 of the spindle and an alined recess in the tool holder 127. By reason of this construction a very rigid connection is provided between the tool holder and the lower end of the spindle which will insure accuracy in operation.

The tool spindle 121 is provided with an axially extending bore 132 forming an oil duct, and the tool holder 127 is also provided with an axial bore communicating therewith to supply oil to the tool. The shank 133 of the tool fits closely within a socket in the tool holder and is held therein in any suitable manner as by a set screw, the shank of the tool being provided with an axial oil duct for supplying oil to the cutting edge of the tool. The upper end of the tool spindle 121 is slidably feathered to the hub of a gear 134 which is mounted in ball bearings 135 in the cylindrical portion of the housing 53.

The housing 63 is provided with a cover plate 136 having a central aperture which is closed by a bearing member 137 which is secured to the cover plate 136. An anti-friction thrust bearing 138 is interposed between the bearing member 137 and the hub of the gear 134. The bearing member 137 has'an upwardly extending tubular portion which encloses the lower end of an upwardly extending sleeve 139 forming an oil reservoir from which oil overflows into the open upper end of the axial bore 132 of thespindla-thereby providing means for continuously-supplying oil to the tool. Oil is supplied to the reservoir through a pipe 140 which extends into an annular chamber in the bearing member 137 and suitable apertures in the sleeve 139 establish communication between said chamber and the reservoir.

The gear 134 is actuated by a suitable train of gears from theshaft 141- of'the motor 64.. As illustrated, the motor shaft 141 isprovided with a pinion 142 which engages a gear 143 upon a vertical shaft 144 suitably mounted in the housing 65 and provided at its upper end with a pinion 145 which engages the'gear 134. I i

In the preferred embodiment of the invention each of the spindles is actuated by an independent motor. Each of the tool slides is fed toward the work by a cam mounted upon a plate secured to the tool-supporting frame. The cam follower of each of the tool slides is yieldably held in engagement with its actuating cam by a counterweight. Each of the tool frames is adjustable both radially and circumferentially with respect to the axis of the column to permit accurate centering of the tool with respect to the work. The construction of the bracket and tool-supporting frames is exceedingly rigid and the mechanisms for providing adjustment are such that a proper adjustment of each tool can be readily made and the parts rigidly locked in adjusted position, thereby insuring extreme accuracy in the operation of the tools.

The work supporting and indexing mechanism, which is utilized in the present invention and which is described in my prior application, is

especially designed to insure accuracy in posigiorliing the work with respect to the positioned In order to insure accurate initial positioning of the tool relatively to the work, and to avoid vibration of the tool where a small tool is employed, or the tool subjected to heavy duty, a tool guide 146 is located in close proximity to the work and is clamped upon the ring 14 by bolts 147. The tool guide 146 is provided with a hardened bushing 148 which closely fits the tool.

The entire construction is of such simple but rigid character as to minimize wear during the operation of the machine and practically eliminates the necessity of tearing down a machine for the purpose of replacing parts and lapping down relatively movable parts to produce a proper fit which is frequently required in other machines for performing the work for which the present machine is designed.

It will be understood that the particular embodiments of the invention disclosed herein are of an illustrative character and are not restrictive, and that various changes in construction, design and arrangement of parts may be made Within the spirit and scope of the following claims. Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, tool-supporting frames mounted upon the respective posts, means including aneccentric for adjusting each of the respective frames in a direction substantially radial to the axis. of said column, tool slides mounted in the respective frames, and means for actuating said tool slides.

2. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, eccentric sleeves mounted upon said posts, tool-supporting frames mounted upon the respective sleeves, means for rotarily adjusting each of said eccentric sleeves to vary the radial distance of the frame mounted thereupon from the axis of the column, tool slides mounted in the respective frames, and means for actuating said tool slides.

3. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, tool-supporting frames mounted upon the respective posts, means for adjusting each of said tool-supporting frames circumferentially about its post, tool slides mounted in the respective frames, and means for actuating said tool slides.

4. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, eccentric sleeves rotatably mounted upon said posts, tool-supporting frames mounted upon the respective sleeves, means for adjusting each of said tool-supporting frames circumferentially about its post, means for rotarily adjusting each of the respective eccentric sleeves about the axis of its post, tool slides mounted in the respective frames, and means for actuating said tool slides.

5. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, eccentric sleeves mounted upon the respective posts, toolsupporting frames having laterally extending members mounted upon the respective sleeves, means for rotarily adjusting each of said eccentric sleeves to vary the radial distance of the tool-supporting frame mounted thereupon from the axis of the column, means for locking the respective frames in adjusted position, tool slides mounted in the respective frames, and means for actuating said tool slides.

6. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, eccentric sleeves, having longitudinal slots extending inwardly from their upper and lower ends, mounted on the respective posts, tool-supporting frames having split members embracing the slotted end portions of said eccentric sleeves, means for rotarily adjusting each of said eccentric sleeves to vary the radial distance of the frame mounted thereupon from the axis of the column, means for clamping the split members of the frame upon the sleeves operable also to clamp the sleeve firmly upon the post, tool slides mounted in the respective frames, and means for actuating said tool slides.

'7. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, eccentric sleeves mounted upon the respective posts, toolsupporting frames having laterally extending members mount-ed upon the respective sleeves, means including a turnbuckle connecting each frame to the eccentric sleeve upon which it is mounted operable to adjust said eccentric sleeve, means for locking the frame in adjusted position, tool slides mounted in the respective frames, and means for actuating said tool slides.

8. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, tool-supporting frames mounted upon the respective posts, eccentrically operable means for adjusting the respective frames substantially radially relatively to the axis of said column, tool slides mounted in the respective frames, means for actuating said tool slides, independent means for locking each frame in adjusted position, adjustable means connecting adjacent tool-supporting frames each operable to adjust the position of an unlocked frame relatively to an adjacent locked frame and circumferentially with respect to the axis of the post upon which the unlocked frame is mounted.

9. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at said tool stations, tool-supporting frames mounted upon the respective posts, eccentrically operable means for adjusting the respective frames substantially radially relatively to the axis of said column, tool slides mounted in the respective frames, means for actuating said tool slides, independent means for locking each frame in adjusted position, rigid means including turnbuckle members pivotally connected at opposite ends to adjacent tool-supporting frames each operable to adjust the position of an unlocked frame relatively to an adjacent locked frame and circumferentially with respect to the axis of the post upon which the unlocked frame is mounted.

10. A machine of the class described comprising a base, a central hollow column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having vertical hollow cylindrical posts rigid therewith located at said tool stations, tool-supporting frames mounted upon the respective posts each having an upper and lower head spaced apart by a hollow vertical web, a tool slide reciprocably mounted in each tool-supporting frame, means connected to the lower portion of said tool slide extending through said hollow web including a flexible member passing over a pulley mounted upon the upper end of the hollow post which supports the frame in which the tool slide is mounted, and a counterweight connected to said flexible member reciprocable within said hollow post, and means for forcing the tool slide downwardly to feed the. tool to and into the work.

11. A machine of the class described comprising a base, a central hollow column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having vertical hollow cylindrical posts rigid therewith located at said tool stations, tool-supporting frames mounted upon the respective posts each having an upper and lower head spaced apart by a hollow vertical web, a tool slide reciprocably mounted in each tool-supporting frame, means connected to the lower portion of said tool slide extending through said hollow web including a flexible member passing over a pulley mounted upon a bracket upon the upper end of a hollow post which supports the frame in which the tool slide is mounted, a counterweight connected to said flexible member reciprocable within said hollow post, means for forcing the tool slide downwardly to feed the tool to and into the work, and means for adjusting said pulley-supporting bracket rotarily about the axis of said hollow post.

12. A machine of the class described comprising a base, a central column rising therefrom, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a bracket on said column having rigid vertical cylindrical posts located at the respective tool stations, tool-supporting frames mounted upon the respective posts, a tool slide mounted in each frame and provided with a cam follower, a cam frame, means operable thereby to rotate the tool spindle carried by the frame upon which the motor is mounted, and independent means for adjusting the respective tool-supporting frames substantially radially and also substantially circumferentially with respect to the axis of said column.

13. A machine of the class described comprising a base, a central column rising therefrom, a bracket on said column, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a tool-supporting frame mounted on said bracket at each of the respective tool stations having rigidly spaced upper and lower heads, a cam-supporting plate detachably secured to said heads, a cam shaft journalled in a bearing in said plate, a cam detachably secured to said cam shaft, a tool slide reciprocably mounted in said frame having a cam follower engaging said cam, means for actuating said cam to feed the tool to and into the work, and yieldable means for maintaining the cam follower in engagement with the cam.

14. A machine of the class described comprising a base, a central column rising therefrom, a bracket on said column, a table rotatable about the axis of said column to present the work at a plurality of tool stations, a tool-supporting frame mounted on said bracket at each of the respective tool stations having rigidly spaced upper and lower heads, a cam-supporting plate detachably secured to said heads, means for adjusting said cam plate vertically relatively to said heads, a cam shaft journalled in a bearing in said plate, a cam on said cam shaft, a tool slide reciprocably mounted in said frame having a cam follower engaging said cam, means for actuating said cam to feed the tool to and into the work, and yield able means for maintaining the cam follower in engagement with the cam.

15. A machine of the class described comprising a tool-supporting frame having rigidly spaced upper and lower heads, a tubular cylindrical tool slide mounted in a bearing in the lower head and provided with a recess centrally of its length, a bearing sleeve mounted upon the upper head extending through the chamber of said tool slide and providing an internal bearing therefor, a cam follower having a base fitting said recess, means detachably securing said base to said tool slide, a cam-supporting plate detachably secured to said heads, a cam shaft journalled in a bearing in said cam plate, a cam on said cam shaft engaging said cam follower, yieldable means for maintaining said cam follower in engagement with said tool slide, means for rotating said cam shaft, a tool spindle rotatably mounted in said tool slide, and means for rotating said tool spindle.

16. A machine of the class described comprising a base, a central hollow column rising vertically from and detachably secured to said base, a vertical driving shaft extending axially of said column and formed in upper and lower alined sections mounted respectively in bearings in said column and said base and abutting at their ends in proximity to the base of said column, sleeves rigidly secured to the adjacent ends of the respective sections, means for detachably connecting said sleeves together comprising a springactuated pin mounted in one section, and a complementary socket in the other section operable upon erection of said column on said base with the shaft sections in alinement automatically to engage and thereby to couple the shaft sections together.

RALPH M. LOVEJOY. 

